Hi All: I wanted to share my experiences briefly from removing my optical drive and replacing it with an SSD + HDD combination in my MBP 5,1. I've had this arrangement for over a year now. I'll call the original HDD bay Bay0 and the optical bay Bay1. Some details: --I am using the MCE Tech caddy (in Bay1) --HDD: WDC WD3200BEKT-22F3T0 on which the user "partition" is kept --SSD: INTEL SSDSA2M080G2GC on which the system partition is kept Originally I decided to put the WD drive in Bay1 and the SSD in Bay0. However, I kept noticing a very bad clicking sound from the HDD no matter what my energy saver conditions regarding HD spin down in OS X were. My thought, unsubstantiated, was that power delivered to Bay1 was somehow delivered differently than Bay0. The clicking sound really made me think that my optical drive was being damaged. Has anyone else noticed this? I've since moved my SSD into Bay1 and the HDD into Bay0. I had zero problems booting up after this. The clicking is gone, but I cannot help but wonder if somehow my SSD is being damaged by whatever was making my HDD click while in Bay1. Finally, after several unsuccessful attempts at installing any Linux distro in a dual boot config on my HDD in Bay0 (which had more space), I decided to try to install it on the SSD in Bay1, which is the OS X startup disk. That worked perfectly, suggesting to me that something in the refit+grub chain really liked the startup partitions to be on the same disk. But again two questions remain: --Does anyone have an explanation as to why the HDD would have been clicking in Bay1? --Could the SSD in Bay1 be damaged by whatever was making the HDD click?